I am planning on starting a ninjutsu class within the next few weeks.I stopped by the dojo and watched one of the classes to find out that the style relied on a lot of ukemi(rolls,falls,etc.). Since i am the type of person who ends up getting hurt every time i try a basic somersault,I was wondering if anyone experienced in ukemi,ninjutsu,or even gymnastics could give me some exercises or drills to do so i can get accustomed to rolls and ukemi. Also i would appreciate it if anyone could give me some tips to getting physically ready for ninjutsu.Thank you very much.